Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Morgan G. Hall is active.

Publication


Featured researches published by Morgan G. Hall.


Nature Materials | 2015

Destruction of chemical warfare agents using metal–organic frameworks

Joseph E. Mondloch; Michael J. Katz; William C. Isley; Pritha Ghosh; Peilin Liao; Wojciech Bury; George W. Wagner; Morgan G. Hall; Jared B. DeCoste; Gregory W. Peterson; Randall Q. Snurr; Christopher J. Cramer; Joseph T. Hupp; Omar K. Farha

Chemical warfare agents containing phosphonate ester bonds are among the most toxic chemicals known to mankind. Recent global military events, such as the conflict and disarmament in Syria, have brought into focus the need to find effective strategies for the rapid destruction of these banned chemicals. Solutions are needed for immediate personal protection (for example, the filtration and catalytic destruction of airborne versions of agents), bulk destruction of chemical weapon stockpiles, protection (via coating) of clothing, equipment and buildings, and containment of agent spills. Solid heterogeneous materials such as modified activated carbon or metal oxides exhibit many desirable characteristics for the destruction of chemical warfare agents. However, low sorptive capacities, low effective active site loadings, deactivation of the active site, slow degradation kinetics, and/or a lack of tailorability offer significant room for improvement in these materials. Here, we report a carefully chosen metal-organic framework (MOF) material featuring high porosity and exceptional chemical stability that is extraordinarily effective for the degradation of nerve agents and their simulants. Experimental and computational evidence points to Lewis-acidic Zr(IV) ions as the active sites and to their superb accessibility as a defining element of their efficacy.


Inorganic Chemistry | 2015

Tailoring the Pore Size and Functionality of UiO-Type Metal–Organic Frameworks for Optimal Nerve Agent Destruction

Gregory W. Peterson; Su Young Moon; George W. Wagner; Morgan G. Hall; Jared B. DeCoste; Joseph T. Hupp; Omar K. Farha

Evaluation of UiO-66 and UiO-67 metal-organic framework derivatives as catalysts for the degradation of soman, a chemical warfare agent, showed the importance of both the linker size and functionality. The best catalysts yielded half-lives of less than 1 min. Further testing with a nerve agent simulant established that different rate-assessment techniques yield similar values for degradation half-lives.


Angewandte Chemie | 2016

Ultra-Fast Degradation of Chemical Warfare Agents Using MOF–Nanofiber Kebabs

Junjie Zhao; Dennis T. Lee; Robert Yaga; Morgan G. Hall; Heather F. Barton; Ian R. Woodward; Christopher J. Oldham; Howard J. Walls; Gregory W. Peterson; Gregory N. Parsons

The threat associated with chemical warfare agents (CWAs) motivates the development of new materials to provide enhanced protection with a reduced burden. Metal-organic frame-works (MOFs) have recently been shown as highly effective catalysts for detoxifying CWAs, but challenges still remain for integrating MOFs into functional filter media and/or protective garments. Herein, we report a series of MOF-nanofiber kebab structures for fast degradation of CWAs. We found TiO2 coatings deposited via atomic layer deposition (ALD) onto polyamide-6 nanofibers enable the formation of conformal Zr-based MOF thin films including UiO-66, UiO-66-NH2 , and UiO-67. Cross-sectional TEM images show that these MOF crystals nucleate and grow directly on and around the nanofibers, with strong attachment to the substrates. These MOF-functionalized nanofibers exhibit excellent reactivity for detoxifying CWAs. The half-lives of a CWA simulant compound and nerve agent soman (GD) are as short as 7.3 min and 2.3 min, respectively. These results therefore provide the earliest report of MOF-nanofiber textile composites capable of ultra-fast degradation of CWAs.


Chemistry: A European Journal | 2016

Detoxification of Chemical Warfare Agents Using a Zr6 -Based Metal-Organic Framework/Polymer Mixture.

Su Young Moon; Emmanuel Proussaloglou; Gregory W. Peterson; Jared B. DeCoste; Morgan G. Hall; Ashlee J. Howarth; Joseph T. Hupp; Omar K. Farha

Owing to their high surface area, periodic distribution of metal sites, and water stability, zirconium-based metal-organic frameworks (Zr6 -MOFs) have shown promising activity for the hydrolysis of nerve agents GD and VX, as well as the simulant, dimethyl 4-nitrophenylphosphate (DMNP), in buffered solutions. A hurdle to using MOFs for this application is the current need for a buffer solution. Here the destruction of the simulant DMNP, as well as the chemical warfare agents (GD and VX) through hydrolysis using a MOF catalyst mixed with a non-volatile, water-insoluble, heterogeneous buffer is reported. The hydrolysis of the simulant and nerve agents in the presence of the heterogeneous buffer was fast and effective.


Chemistry: A European Journal | 2017

Optimizing Toxic Chemical Removal through Defect‐Induced UiO‐66‐NH2 Metal–Organic Framework

Gregory W. Peterson; Matthew R. DeStefano; Sergio J. Garibay; Ann M. Ploskonka; Monica McEntee; Morgan G. Hall; Christopher J. Karwacki; Joseph T. Hupp; Omar K. Farha

For the first time, an increasing number of defects were introduced to the metal-organic framework UiO-66-NH2 in an attempt to understand the structure-activity trade-offs associated with toxic chemical removal. It was found that an optimum exists with moderate defects for toxic chemicals that react with the linker, whereas those that require hydrolysis at the secondary building unit performed better when more defects were introduced. The insights obtained through this work highlight the ability to dial-in appropriate material formulations, even within the same parent metal-organic framework, allowing for trade-offs between reaction efficiency and mass transfer.


Journal of Materials Chemistry | 2018

Efficient MOF-based degradation of organophosphorus compounds in non-aqueous environments

Dorina Florentina Sava Gallis; Jacob A. Harvey; Charles J. Pearce; Morgan G. Hall; Jared B. DeCoste; Mark K. Kinnan; Jeffery A. Greathouse

Decontamination of sensitive electronics exposed to chemical contaminants such as chemical warfare agents (CWA) is incompatible with existing water-based/corrosive methods. The development of new chemistries to tackle this challenge is of great interest. In this paper we investigate the effectiveness of metal–organic frameworks (MOFs) to degrade organophosphorus compounds in non-aqueous environments, via a combined experimental-molecular modeling study. Emphasis is placed on understanding the effect of framework characteristics (metal identity and linker functional group) on the methanolysis of these toxic chemicals, along with identifying reactivity trends for relevant sarin (GB) simulants. Several representative materials based on a hexanuclear metal cluster were judiciously selected, including the well-known catalytically active MOF, UiO-66. Complementary insights into the vibrational and structural properties of these materials were provided by periodic density functional theory (DFT) calculations. Findings indicate that Zr is a more effective metal center to support the degradation of organophosphorus compounds in methanol, as compared to Eu and Y. Detailed investigation into the reactivity of three relevant simulant candidates (diethyl chlorophosphate, DECP, dimethyl 4-nitrophenylphosphate, DMNP, and diisopropyl fluorophosphate, DFP), revealed that nitro- and fluorophosphates are better surrogates to mimic the reactivity of GB in methanol, as compared to chlorophosphate-based molecules. Importantly, experimental results on the MOF based degradation of GB in methanol are reported here for the first time. Additionally, this is the first study that systematically investigates the effectiveness of using MOFs for the solvolysis of organophosphorus compounds, providing valuable insights for materials design and simulant downselection.


ACS Applied Materials & Interfaces | 2018

Chemical Protective Textiles of UiO-66-Integrated PVDF Composite Fibers with Rapid Heterogeneous Decontamination of Toxic Organophosphates

Derek B. Dwyer; Nicholas Dugan; Nicole Hoffman; Daniel J. Cooke; Morgan G. Hall; Trenton M. Tovar; William E. Bernier; Jared B. DeCoste; Natalie Pomerantz; Wayne E. Jones

Metal-organic frameworks (MOFs) are a new and growing area of materials with high porosity and customizability. UiO-66, a zirconium-based MOF, has shown much interest to the military because of the ability of the MOF to catalytically decontaminate chemical warfare agents (CWAs). Unfortunately, the applications for MOFs are limited because of their powder form, which is difficult to incorporate into protective clothing. As a result, a new area of research has developed to functionalize fabrics with MOFs to make a wearable multifunctional fabric that retains the desired properties of the MOF. In this work, UiO-66 was incorporated into poly(vinylidene) fluoride/Ti(OH)4 composite fabric using electrospinning and evaluated for its use in chemical protective clothing. The base triethanolamine (TEA) was added to the composite fabric to create a self-buffering system that would allow for catalytic decontamination of CWAs without the need for a buffer solution. The fabrics were tested against the simulants methyl-paraoxon (dimethyl (4-nitrophenyl) phosphate, DMNP), diisopropyl fluorophosphate (DFP), and the nerve agent soman (GD). The results show that all of the samples have high moisture vapor transport and filtration efficiency, which are desirable for protective clothing. The incorporation of TEA decreased air permeation of the fabric, but increased the catalytic activity of the composite fabric against DMNP and DFP. Samples with and without TEA have rapid half-lives ( t1/2) as short as 35 min against GD agent. These new catalytically active self-buffering multifunctional fabrics have great potential for application in chemical protective clothings.


ACS Applied Materials & Interfaces | 2017

MOFabric: Electrospun Nanofiber Mats from PVDF/UiO-66-NH2 for Chemical Protection and Decontamination

Annie Xi Lu; Monica McEntee; Matthew A. Browe; Morgan G. Hall; Jared B. DeCoste; Gregory W. Peterson


Chemistry of Materials | 2017

Cerium(IV) vs Zirconium(IV) Based Metal-Organic Frameworks for Detoxification of a Nerve Agent

Timur Islamoglu; Ahmet Atilgan; Su Young Moon; Gregory W. Peterson; Jared B. DeCoste; Morgan G. Hall; Joseph T. Hupp; Omar K. Farha


ACS Applied Materials & Interfaces | 2017

Chemical Warfare Agents Detoxification Properties of Zirconium Metal–Organic Frameworks by Synergistic Incorporation of Nucleophilic and Basic Sites

Rodrigo Gil-San-Millan; Elena López-Maya; Morgan G. Hall; Natalia M. Padial; Gregory W. Peterson; Jared B. DeCoste; L. Marleny Rodriguez-Albelo; J. Enrique Oltra; Elisa Barea; Jorge A. R. Navarro

Collaboration


Dive into the Morgan G. Hall's collaboration.

Top Co-Authors

Avatar

Gregory W. Peterson

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar

Jared B. DeCoste

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

George W. Wagner

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar

Matthew A. Browe

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar

Monica McEntee

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar

Trenton M. Tovar

Edgewood Chemical Biological Center

View shared research outputs
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge